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Take a look at this cache: http://www.geocaching.com/seek/cache_details.asp?ID=10335

I am a member of the American Cryptogram Associaition, and I regularly break Vigenere ciphers that have about 100 letters in the message. The normal method involves calculating the keyword from the cipher text, so breaking the text does not guarantee that a person has visited the virtual geocache.

I am a member of the American Cryptogram Associaition, and I regularly break Vigenere ciphers that have about 100 letters in the message. The normal method involves calculating the keyword from the cipher text, so breaking the text does not guarantee that a person has visited the virtual geocache.